Yamaha rx v480

Page 1

STEREO RECEIVER

X-V4 80/ R-V98

SERVICE MANUAL

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/ IMPORTANT NOTICE \

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel.
it has been assumed that basic service procedures inherent to the industry. and more specifically YAMAHA Products. are
already known und understood by the users, and have therefore not been restated.

WARNING: Failure to follow appropriate service and safety procedures when servicing this product may result in
personal injury, destruction of expensive components. and failure of the product to perform as speci<
fied. For these reasons. we advise nu YAMAHA product owners that any service required should be
performed by an authorized YAMAHA Retailer or the appointed service representative

IMPORTANT: The presentation or sale of this manual to any individual or firm does not constitute authorization,
certification or recognition of any applicable technical capabilities, or establish a principle-agent
relationship of any form.

The dam provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The rescuch. engi-
neering. and service departments of YAMAHA are continually striving to improve YAMAHA products. Modifications
are. therefore, inevitable and specifications are subject to change without notice or obligation to retrofit. Should any
) _ discrepancy appear to exist. please contact the distributors Service Division.

WARNING: Static discharges can destroy expensive components. Discharge any static electricity your body may
have accumulated by grounding yourself to the ground buss in the unit (heavy gauge black wires
connect to this buss).

IMPORTANT: Turn the unit OFF during disassembly and part replacement. Recheclt all wetlt before you apply power

v \ to the unit.
I CONTENTS

TO SERVICE PERSONNEL
REAR PANELS

BLOCK DIAGRAM 17~19
PRINTED CIRCUIT BOARD 20~29
SPECIFICATIONS .. DISPLAY DATA ..
INTERNAL VIEW ..5 TEST POINT WAVEFORMS...
DISASSEMBLY PROCEDURES 5 SCHEMATIC DIAGRAM 32~36
TEST SIGNAL PROGRAM PARTS LIST 37~47
ADJUSTMENTS .. REMOTE CONTROL TRANSMITTER .
IC DATA

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Copyright 2004 YAMAHA CORPORATION Q

1 0 0 49 0 Thisma-nual is copyrighted by YAMAHAVand may not be copied or YAMAHA CORPORATION Ix
redistributed either in print or electronically Without permission. P.O.Box1,Hamamatquapan <

31K-963 in ® Printed in Japan '94.4 e

Page 2

RX-V480/R-V98

RX-V480IR-V98

I TO SERVICE PERSONNEL

1. Critical Components lniormation. AC LEAKAGE
Components havlng special characteristics are marked and WALL EQUIPMENT TESTER OR
must be replaced with parts having specifications equal to OUTLET UNDER TEST EQUIVALENT
those orignally installed.

2, Leakage Current Measurement (For 120V Models Only). ® D J:-

When service has been completed, it is imperative to verify

that all exposed conductive surtaces are properly insulated

from supply circuits. INSULATING
TABLE

0 Meter impedance should be equivalent to 1500 ohm shunted
by 0.15pF. -

o Leakage current must not exceed 0.5mA.

0 Be sure to test for leakage with the AC plug in both
polarities.

WARNING: CHEMICAL CONTENT NOTICE!

The solder used in the production of this product contains LEAD. In addition, other electrical/electronic
and/or plastic (where applicable) components may also contain traces of chemicals found by the
California Health and Welfare Agency (and possibly other entities) to cause cancer and/or birth defects
or other reproductive harm.

DO NOT PLACE SOLDER, ELECTRICAL/ELECTRONIC OR PLASTIC COMPONENTS IN YOUR MOUTH
FOR ANY REASON WHATSOEVER!

Avoid prolonged. unprotected contact between solder and your skinl When soldering, do not inhale
solder fumes or expose eyes to solder/flux vapor!

It you come in contact with solder or components located inside the enclosure of this product, wash
your hands before handling food.

I REAR PANELS

V RX-V480/R-V98 U model